Samoa's prime minister is denying claims by the Fiji interim government that the two Pacific nations have mended relations.

Tuilaepa Sailele has been a staunch critic of Fiji and its coup-installed leader, Commodore Frank Bainimarama.

Last week, Fiji said a statement of conciliation was made by the Samoan prime minister at a kava drinking session at the United Nations in New York.

Tuilaepa Sailele has denied this, and says his government has not changed its policies towards Fiji at all.

The Samoan leader told Radio Australia's Pacific Beat he stands by the decision to exclude Fiji from the Pacific Islands Forum until democracy is restored.

"It is only right for us to provide Fiji with the benefit of the doubt that we should be flexible in our approach and hope for the best, that they will proceed with these promises of a fair elections - and it must be fair," Mr Sailele said.

"If that is done, and only after this has taken place, we can then formally admit Fiji back into the Forum."